Have you considered building your own?
The truly critical parts are the barrel / bolt, bolt carrier, trigger group.
The rest of the parts just hold the critical parts together.
As long as they are made to MilSpec or equivalent, there is no need to spend big $ for a name.
Buy yourself a high quality barrel / bolt. Preferably, buy the BCG from the same company. Buy a high quality trigger assembly, Geissele comes to mind.
The lower and uppers, as long as they are made properly are not stressed, do not handle firing pressures and can come from any decent manufacturer.
Build your own and save the $100.00 federal tax on complete firearms too!
(Help wean the federal spendthrifts off our tax $. Spend the $ yourself.)
Trigger control + Breath control + Sight alignment = Gun Control.
NRA Smallbore Prone Master